US5774427A - Electric switch device on a printed circuit and watch comprising such a device - Google Patents

Electric switch device on a printed circuit and watch comprising such a device Download PDF

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Publication number
US5774427A
US5774427A US08/941,291 US94129197A US5774427A US 5774427 A US5774427 A US 5774427A US 94129197 A US94129197 A US 94129197A US 5774427 A US5774427 A US 5774427A
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US
United States
Prior art keywords
contact element
contact
substrate
plane
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/941,291
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English (en)
Inventor
Jean-Philippe Rebeaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
Eta SA Fabriques dEbauches
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Filing date
Publication date
Application filed by Eta SA Fabriques dEbauches filed Critical Eta SA Fabriques dEbauches
Assigned to ETA SA FABRIQUES D'EBAUCHES reassignment ETA SA FABRIQUES D'EBAUCHES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REBEAUD, JEAN-PHILIPPE
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C1/00—Winding mechanical clocks electrically
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001—Electromechanical switches for setting or display
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H01H2001/5811—Connections to printed circuits both fixed and movable contacts being formed by blank stamping and mounted or soldered on printed circuit board without any other housing elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/016—Application timepiece
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted

Definitions

  • the present invention concerns an electric switch device on a printed circuit comprising an insulating substrate which extends substantially in a plane in the area of the switch and which carries at least one conductive pad of the printed circuit, the device further comprising a contact element fixed to a point of attachment which is fixed with respect to the substrate, said contact element being able to be deformed elastically between a rest position in which it does not contact the conductive pad and a closing position in which a contact portion of said contact element is in contact with said pad, and a control element which is able to move in a direction of pressure substantially parallel to the plane of the substrate and distant from said plane to push said contact element in said direction in order to place said contact element in its closing position.
  • the invention also concerns a watch comprising a case and such a device in the case.
  • the conventional solution thus consists of using, facing each push-button, a switch arranged outside the printed circuit and closing in the direction of action of the push-button, thus parallel to the plane of the printed circuit.
  • a space requirement which is inconvenient in an object of small size such as a watch case.
  • Patent publications U.S. Pat. No. 4,062,181, U.S. Pat. No. 4,122,664 and EP-A-0703 512 disclose devices of this type.
  • a table alarm-clock fitted with a type of switch having a flexible contact strip mounted directly on a flat substrate and actuated by a control button which slides into a slit parallel to the plane of the substrate is known from Patent U.S. Pat. No. 4,423,966.
  • the strip has a wide open inverted V shape, to provide a ramp with a slight slope acting as a cam against which the control button abuts while sliding to lower the strip by bending it until the free end of the strip contacts a contact pad on the substrate.
  • This construction is not suitable for a watch, because one can hardly guarantee water tightness in the region of the slit and also because such a switch is too inaccurate to control chronographic functions.
  • the friction of the button on the cam surface is inconvenient for the operator and causes wear.
  • U.S. Pat. No. 4,144,428 discloses a switch of the type defined in the preamble hereinbefore, i.e. converting the control movement parallel to the plane of the substrate into a closing movement of the electric contact by deforming the contact element to bring it closer to the substrate carrying the conductive pad onto which it must be applied.
  • An inverted rectangular U-shaped metal frame is fixed onto a printed circuit board which is assumed to be horizontal and supports a horizontal push-button stem which may slide through the frame.
  • the contact element is a flexible strip having a fixed supporting point which abuts against an inner angle of the frame, and a mobile supporting point formed by a collar of the stem. When the stem is pushed, the strip bends downwards and contacts a conductive pad on the printed circuit.
  • This construction is relatively heavy and requires space on the printed circuit and further poses problems of lubrication and wear which may affect its operation.
  • An object of the present invention is to avoid the drawbacks of the prior art, by providing a switch device on a printed circuit having a very simple and inexpensive construction, which operates reliably and requires little space, allowing it, in particular, to be used in a object of small size such as a wristwatch.
  • a first aspect of the invention therefore concerns an electric switch device of the type indicated hereinbefore, characterised in that the point of attachment is situated close to the plane of the substrate and in that the contact element is flexible between the point of attachment and a point of application of said pressure, so that it bends under said pressure and that the contact portion follows a trajectory approximately perpendicular to the plane of the substrate when it comes into contact with the conductive pad.
  • the contact element bends mainly in the vicinity of its point of attachment situated close to the substrate plane and preferably in the plane itself, so that the remainder of the contact element effects a substantially pivoting movement about this main bending zone. Since the contact portion of the contact element is also close to the substrate plane, its trajectory then descends, and is thus approximately perpendicular to such plane. Conversely, the point of pressure application is distant from this plane and thus follows a trajectory having a horizontal component. Such trajectory may be completely horizontal if the point of pressure application is situated vertical to the main bending zone.
  • the contact element preferably comprises a prominent portion situated at a distance from said plane, a first leg joined to the prominent portion and comprising the contact portion, and a second flexible leg joined to the prominent portion and fixed to the point of attachment, the point of pressure application being situated on the prominent portion or close to the latter.
  • the point of attachment of the contact element may either be situated on the substrate, so that the element is attached to the printed circuit, or onto another element which is fixed with respect to the substrate, so that the printed circuit requires less space, in particular for stocking purposes.
  • the printed circuit may comprise a second conductive pad which is electrically connected to the contact element at the point of attachment.
  • the prominent portion of the contact element, comprising the pressure application point may extend beyond an edge of the substrate towards the control element, in particular if one does not wish such element to extend above the printed circuit.
  • a second aspect of the invention concerns a watch comprising a case and a device according to the first aspect of the invention, the watch being characterised in that the plane of the substrate is substantially parallel to a back cover of the case and in that the control element comprises a manual push-button arranged in a middle part of the case and having, facing the contact element, a bearing surface perpendicular to the direction of pressure.
  • the push-button may be formed by an element able to be deformed made of elastomeric material.
  • the push-button bearing surface may be arranged to abut directly against the contact element, or a transmission element, in particular in the shape of a ball, may be inserted between the push-button bearing surface and the contact element, said transmission element being guided into the case to be able to move in the direction of pressure.
  • FIG. 1 a partial cross-section of a watch comprising a preferred embodiment of an electric switch device according t he invention
  • FIG. 2 is an enlarged lateral elevation view of the contact element of the switch shown in FIG. 1;
  • FIG. 3 is an enlarged plane view of the switch shown in FIG. 1;
  • FIG. 4 is a similar view to FIG. 1 showing another embodiment
  • FIG. 5 is a plane view of the contact element illustrated in FIG. 4.
  • FIG. 6 shows an alternative of the device illustrated in FIG. 4.
  • the watch partially shown in FIG. 1 comprises a case 1 including a back cover 2, a middle part 3 fitted with one or more lateral push-buttons 4, a bezel 5 and a crystal 6 covering digital or analogue display means, for example hands which are not shown and a dial 7. Between back cover 2 and dial 7 there is a central compartment 8 which contains a clockwork movement which is not shown.
  • back cover 2 and middle part 3 are formed by a single piece made of a synthetic material, onto which bezel 5, also made of a synthetic material, is welded. Crystal 6 is welded or bonded onto bezel 5 and holds dial 7.
  • Push-button 4 shown is a part made of elastomeric material able to be deformed, housed in a lateral orifice of middle part 3 and preferably made by duplicate moulding.
  • Push-button 4 comprises a central axis 9 parallel to back cover 2 of the case, a head 10 protruding outside the case, and a bearing surface 11 arranged on a protruding portion 12 of the push-button within the case facing compartment 8. This surface 11 is preferably flat and perpendicular to back cover 2 when the push-button is in its rest position. In a perpendicular plane to that of FIG. 1, push-button 4 may have for example a circular or oblong shape.
  • Compartment 8 contains a printed circuit 13 fitted with an electric switch 14.
  • Printed circuit 13 which may be of a conventional type, comprises an insulating substrate 15 formed by a relatively rigid board which extends in a plane 16 substantially parallel to back cover 2 of case 1. In the example shown, substrate 15 is directly fixed to back cover 2, but it could be fixed to any other fixed element of the case.
  • printed circuit 13 On the upper face of the substrate, printed circuit 13 comprises conductive tracks 17, 18 connected to respective conductive pads 19, 20 (FIG. 3) which form part of switch 14 with a metal contact element 22 fixed to printed circuit 13 by means of two rivets forming two points of attachment 23 of contact element 22.
  • FIGS. 2 and 3 show in more detail the shape of contact element 22 which has been cut from a metal sheet and bent.
  • This contact element comprises a prominent portion 25 elevated with respect to substrate 15, thus situated at a distance from plane 16 of the substrate and extending facing bearing surface 11 of push-button 4 (FIG. 1).
  • a first flexible leg 26 In the middle of prominent portion 25 is joined an end of a first flexible leg 26, whose other end, bent slightly upwards, forms a contact portion 27 situated above conductive pad 20 of printed circuit 13.
  • each end of prominent portion 25 is connected to a second respective flexible leg 28 whose other end 29 forms a foot which is fixed to printed circuit 13 by the corresponding rivet.
  • FIG. 3 shows that one of feet 29 is applied onto conductive pad 19, the latter being connected for example to the ground terminal of the printed circuit by conductive track 17.
  • contact element 22 which has just been described is that its prominent portion 25 may be situated, in plane view, beyond an edge 31 of printed circuit 13, so that such edge does not need to be close to push-button 4. This may also allow a reduction in the length of the push-button.
  • watch case 1 comprises a push-button 34, made of elastomeric material, having a central body 35 able to be deformed in a circular or oval bell shape, fixed by duplicate moulding in middle part 3 of watch case 1.
  • Push button 34 has a protruding external head 36 and an internal stem 37 whose end forms a bearing surface 38 perpendicular to axis 39 of the push-button, and thus to the direction of pressure A and to the plane of printed circuit 13.
  • a ball 40 made of an insulating plastic material is inserted between this surface 38 and contact element 42 of switch 14, this ball being guided in a conduit of case 1 so as to slide in direction A when it is pushed by push-button 34 and in the opposite direction when it is pushed back by contact element 42.
  • Contact element 42 has a different shape to contact element 22 described hereinbefore, but it operates in a similar manner. It essentially comprises a metal strip bent in a general inverted U shape, to form a curved prominent portion 43 between a first leg 44, whose free bent end forms contact portion 45, and a second flexible leg 46 having at its end an enlarged foot 47 which is fixed to printed circuit 13 by two rivets forming its points of attachment 48.
  • push-button 34 When push-button 34 is pressed, ball 40 is pressed against prominent portion 43 or the top of second leg 46 of contact element 42, to bend the bottom of such leg to the closing position shown in a dotted line in FIG. 4.
  • Contact portion 45 is thus lowered vertically to abut against the corresponding contact pad of the printed circuit.
  • ball 40 has the advantage of allowing, if necessary, a certain distance between pushbutton 34 and switch 14. It also allows electric insulation between the switch and the push-button, in particular if the latter is made of metal.
  • contact element 42 described hereinbefore be controlled by a pushbutton which abuts against it directly.
  • contact element 42 is not fixed onto printed circuit 13, but onto another fixed piece 50, for example a metal piece electrically connected to a ground terminal. If back cover 2 of the case is made of metal, contact element 42 may even be fixed directly to such back cover.
  • printed circuit 13 thus has a reduced space requirement in height and length, allowing it to be stored and manipulated more easily.
  • This alternative may also be advantageous in cases where the substrate of the printed circuit is flexible and/or curved, or generally of a type which prevents the contact element from being easily fixed thereto.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Clocks (AREA)
  • Push-Button Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Electromechanical Clocks (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)
US08/941,291 1996-12-02 1997-09-30 Electric switch device on a printed circuit and watch comprising such a device Expired - Lifetime US5774427A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96119280A EP0845718B1 (fr) 1996-12-02 1996-12-02 Dispositif d'interrupteur électrique sur un circuit imprimé, et montre comportant un tel dispositif
EP96119280 1996-12-02

Publications (1)

Publication Number Publication Date
US5774427A true US5774427A (en) 1998-06-30

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Family Applications (1)

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US08/941,291 Expired - Lifetime US5774427A (en) 1996-12-02 1997-09-30 Electric switch device on a printed circuit and watch comprising such a device

Country Status (9)

Country Link
US (1) US5774427A (fr)
EP (1) EP0845718B1 (fr)
JP (1) JP4351302B2 (fr)
KR (1) KR100495445B1 (fr)
CN (1) CN1076512C (fr)
AT (1) ATE192858T1 (fr)
DE (1) DE69608286T2 (fr)
HK (1) HK1015070A1 (fr)
SG (1) SG67445A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000031949A1 (fr) * 1998-11-26 2000-06-02 Koninklijke Philips Electronics N.V. Dispositif constitue d'un boitier, d'une carte a circuit imprime integre et de touches dans une paroi laterale du boitier
EP1091376A2 (fr) * 1999-10-09 2001-04-11 Eaton Corporation Interrupteur électrique à touche pivotante
US6636458B1 (en) * 2000-03-29 2003-10-21 Lux Products Corporation Waterproof timer
US20050270909A1 (en) * 2002-10-28 2005-12-08 Noirjean Pierre-Andre Control device for a push-piece, in particular for time piece, and portable electronic instrument comprising same
US8704408B2 (en) 2011-04-14 2014-04-22 National Instruments Corporation Switch matrix modeling system and method
US9097757B2 (en) 2011-04-14 2015-08-04 National Instruments Corporation Switching element system and method
US9157952B2 (en) 2011-04-14 2015-10-13 National Instruments Corporation Switch matrix system and method
US9287062B2 (en) 2012-05-02 2016-03-15 National Instruments Corporation Magnetic switching system
US9558903B2 (en) 2012-05-02 2017-01-31 National Instruments Corporation MEMS-based switching system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028561C2 (de) * 2000-06-09 2002-04-25 Cherry Gmbh Verbindungsanordnung
JP4688511B2 (ja) * 2005-02-04 2011-05-25 セイコーインスツル株式会社 リセット電流導通構造を備えたアナログ電子時計
JP4820720B2 (ja) * 2006-09-07 2011-11-24 セイコーインスツル株式会社 携帯型電子時計
KR20220016718A (ko) * 2020-08-03 2022-02-10 삼성전자주식회사 전극 버튼을 포함하는 전자 장치

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874162A (en) * 1974-07-22 1975-04-01 Timex Corp Solid state watch stem detent and switch assembly
FR2341154A1 (fr) * 1976-02-12 1977-09-09 Bulova Watch Co Inc Anneau de montage pour mouvement d'horlogerie
US4144428A (en) * 1976-12-16 1979-03-13 Veeder Industries Inc. Electrical switch with leaf spring switching element
GB2045531A (en) * 1979-03-23 1980-10-29 Jaeger Electric switch
US4509867A (en) * 1980-04-30 1985-04-09 Ebauches Electroniques S.A. Electronic timepiece movement
US4536095A (en) * 1984-09-13 1985-08-20 Timex Corporation Crown setting switch for a wristwatch
US4538040A (en) * 1983-10-05 1985-08-27 Pass & Seymour, Inc. Electrical switch means particularly adapted to GFCI test and reset switches
US5339297A (en) * 1989-06-19 1994-08-16 Seiko Epson Corporation Switching arrangement for applying battery voltage to circuitry block in an analog timepiece

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062181A (en) 1976-01-16 1977-12-13 Hughes Aircraft Company Combination watch-calculator construction
CH371976A4 (fr) 1976-03-25 1977-08-31
JPS56107189A (en) 1980-01-30 1981-08-25 Seiko Koki Kk Alarm operating device for alarm watch
JP3181095B2 (ja) * 1992-04-14 2001-07-03 ミック電子工業株式会社 プリント基板用プッシュスイッチ
JPH05298980A (ja) * 1992-04-23 1993-11-12 Matsushita Electric Works Ltd 電子タイマの仕様切換装置
DE9415401U1 (de) 1994-09-23 1996-01-25 Junghans Uhren Gmbh, 78713 Schramberg Uhr, insbesondere Armbanduhr, mit Tastschalter zur Betätigung einer elektrischen Kontaktstrecke

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874162A (en) * 1974-07-22 1975-04-01 Timex Corp Solid state watch stem detent and switch assembly
FR2341154A1 (fr) * 1976-02-12 1977-09-09 Bulova Watch Co Inc Anneau de montage pour mouvement d'horlogerie
US4144428A (en) * 1976-12-16 1979-03-13 Veeder Industries Inc. Electrical switch with leaf spring switching element
GB2045531A (en) * 1979-03-23 1980-10-29 Jaeger Electric switch
US4509867A (en) * 1980-04-30 1985-04-09 Ebauches Electroniques S.A. Electronic timepiece movement
US4538040A (en) * 1983-10-05 1985-08-27 Pass & Seymour, Inc. Electrical switch means particularly adapted to GFCI test and reset switches
US4536095A (en) * 1984-09-13 1985-08-20 Timex Corporation Crown setting switch for a wristwatch
US5339297A (en) * 1989-06-19 1994-08-16 Seiko Epson Corporation Switching arrangement for applying battery voltage to circuitry block in an analog timepiece

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000031949A1 (fr) * 1998-11-26 2000-06-02 Koninklijke Philips Electronics N.V. Dispositif constitue d'un boitier, d'une carte a circuit imprime integre et de touches dans une paroi laterale du boitier
EP1091376A2 (fr) * 1999-10-09 2001-04-11 Eaton Corporation Interrupteur électrique à touche pivotante
EP1091376A3 (fr) * 1999-10-09 2003-04-02 Delphi Technologies Inc. Interrupteur électrique à touche pivotante
US6636458B1 (en) * 2000-03-29 2003-10-21 Lux Products Corporation Waterproof timer
US20050270909A1 (en) * 2002-10-28 2005-12-08 Noirjean Pierre-Andre Control device for a push-piece, in particular for time piece, and portable electronic instrument comprising same
US7419297B2 (en) * 2002-10-28 2008-09-02 Eta Sa Manufacture Horlogere Suisse Control device for a push-piece, in particular for time piece, and portable electronic instrument comprising same
US8704408B2 (en) 2011-04-14 2014-04-22 National Instruments Corporation Switch matrix modeling system and method
US9097757B2 (en) 2011-04-14 2015-08-04 National Instruments Corporation Switching element system and method
US9157952B2 (en) 2011-04-14 2015-10-13 National Instruments Corporation Switch matrix system and method
US9287062B2 (en) 2012-05-02 2016-03-15 National Instruments Corporation Magnetic switching system
US9558903B2 (en) 2012-05-02 2017-01-31 National Instruments Corporation MEMS-based switching system

Also Published As

Publication number Publication date
EP0845718A1 (fr) 1998-06-03
KR100495445B1 (ko) 2005-09-29
SG67445A1 (en) 1999-09-21
CN1188974A (zh) 1998-07-29
DE69608286T2 (de) 2001-01-04
DE69608286D1 (de) 2000-06-15
JPH10160869A (ja) 1998-06-19
JP4351302B2 (ja) 2009-10-28
EP0845718B1 (fr) 2000-05-10
CN1076512C (zh) 2001-12-19
HK1015070A1 (en) 1999-10-08
KR19980063592A (ko) 1998-10-07
ATE192858T1 (de) 2000-05-15

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